Latest posts for the topic "JSP精選實用範例(二):檔案上傳"

JSP精選實用範例(二):檔案上傳

andowson — GMT

預先安裝函式庫：[url=http://commons.apache.org/proper/commons-fileupload/download_fileupload.cgi]Apache Commons FileUpload[/url], [url=http://commons.apache.org/proper/commons-io/download_io.cgi]Apache Commons IO[/url]
程式碼：
fileupload.html:
[code=html]

File Upload

檔案上傳

[/code]
fileupload.jsp:
[code]
<%@ page contentType="text/html; charset=UTF-8"%>
<%@ page import="java.io.File"%>
<%@ page import="java.util.Iterator"%>
<%@ page import="java.util.List"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>
<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%@ page import="org.apache.commons.io.FilenameUtils"%>
<%
String saveDirectory = application.getRealPath("/upload");

// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
out.println("isMultipart="+isMultipart+"
");

// Create a factory for disk-based file items
FileItemFactory factory = new DiskFileItemFactory();

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);

//Create a progress listener
ProgressListener progressListener = new ProgressListener(){
private long megaBytes = -1;
public void update(long pBytesRead, long pContentLength, int pItems) {
long mBytes = pBytesRead / 1000000;
if (megaBytes == mBytes) {
return;
}
megaBytes = mBytes;
System.out.println("We are currently reading item " + pItems);
if (pContentLength == -1) {
System.out.println("So far, " + pBytesRead + " bytes have been read.");
} else {
System.out.println("So far, " + pBytesRead + " of " + pContentLength
+ " bytes have been read.");
}
}
};
upload.setProgressListener(progressListener);

// Parse the request
List /* FileItem */ items = upload.parseRequest(request);

// Process the uploaded items
Iterator iter = items.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();

if (item.isFormField()) {
// Process a regular form field
//processFormField(item);
String name = item.getFieldName();
String value = item.getString();
value = new String(value.getBytes("UTF-8"), "ISO-8859-1");
out.println(name + "=" + value+"
");
} else {
// Process a file upload
//processUploadedFile(item);
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
boolean isInMemory = item.isInMemory();
long sizeInBytes = item.getSize();
out.println("fieldName="+fieldName+"
");
out.println("fileName="+fileName+"
");
out.println("contentType="+contentType+"
");
out.println("isInMemory="+isInMemory+"
");
out.println("sizeInBytes="+sizeInBytes+"
");
if (fileName != null && !"".equals(fileName)) {
fileName= FilenameUtils.getName(fileName);
out.println("fileName saved="+fileName+"
");
File uploadedFile = new File(saveDirectory, fileName);
item.write(uploadedFile);
}
}
}
%>
[/code]
注意：
請自行在您網頁應用程式的根目錄下建立一個upload的子目錄，並確認或設定讓Tomcat對upload目錄具有可寫入權限(Linux環境)。
參考資料：
http://commons.apache.org/proper/commons-fileupload/using.html

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

使用Streaming API的方式：
程式碼：
fileupload_streaming.html:
[code=html]

File Upload

檔案上傳

[/code]
fileupload_streaming.jsp:
[code]<%@ page contentType="text/html; charset=UTF-8"%>
<%@ page import="java.io.*"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%@ page import="org.apache.commons.fileupload.util.Streams"%>
<%@ page import="org.apache.commons.io.FilenameUtils"%>
<%
String saveDirectory = application.getRealPath("/upload");

// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
out.println("isMultipart="+isMultipart+"
");

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload();

//Create a progress listener
ProgressListener progressListener = new ProgressListener(){
private long megaBytes = -1;
public void update(long pBytesRead, long pContentLength, int pItems) {
long mBytes = pBytesRead / 1000000;
if (megaBytes == mBytes) {
return;
}
megaBytes = mBytes;
System.out.println("We are currently reading item " + pItems);
if (pContentLength == -1) {
System.out.println("So far, " + pBytesRead + " bytes have been read.");
} else {
System.out.println("So far, " + pBytesRead + " of " + pContentLength
+ " bytes have been read.");
}
}
};
upload.setProgressListener(progressListener);

// Parse the request
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream stream = item.openStream();
if (item.isFormField()) {
String value = Streams.asString(stream);
out.println(name + "=" + value+"
");
} else {
System.out.println("File field " + name + " with file name "
+ item.getName() + " detected.");
// Process the input stream
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
out.println("fieldName="+fieldName+"
");
out.println("fileName="+fileName+"
");
out.println("contentType="+contentType+"
");
if (fileName != null && !"".equals(fileName)) {
fileName= FilenameUtils.getName(fileName);
out.println("fileName saved="+fileName+"
");
File uploadedFile = new File(saveDirectory, fileName);
FileOutputStream uploadedFileStream =
new FileOutputStream(uploadedFile);
Streams.copy(stream, uploadedFileStream, true);
}
}
}
%>
[/code]
參考資料：
http://commons.apache.org/fileupload/streaming.html

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

增加檔案大小限制及檔案類型的篩選：
程式碼：
fileupload_control.html:
[code=xhtml]

File Upload

檔案上傳

[/code]

fileupload_control.jsp:
[code]
<%@ page contentType="text/html; charset=UTF-8"%>
<%@ page import="java.io.File"%>
<%@ page import="java.util.Iterator"%>
<%@ page import="java.util.List"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>
<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%@ page import="org.apache.commons.io.FilenameUtils"%>
<%!
int yourMaxMemorySize = 1024 * 1024 * 1024;
File yourTempDirectory = new File("/tmp");
int yourMaxRequestSize = 100 * 1024 * 1024;
boolean writeToFile = true;
String allowedFileTypes = ".txt .pdf .doc .ppt .xls .csv .dbf .gif .jpg .jpeg .png .swf .htm .html .zip .rar";
%>
<%
String saveDirectory = application.getRealPath("/upload");

// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
out.println("isMultipart=" + isMultipart + "
");

// Create a factory for disk-based file items
DiskFileItemFactory factory = new DiskFileItemFactory(yourMaxMemorySize, yourTempDirectory);

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);

// Set overall request size constraint
upload.setSizeMax(yourMaxRequestSize);

//Create a progress listener
ProgressListener progressListener = new ProgressListener() {
private long megaBytes = -1;

public void update(long pBytesRead, long pContentLength, int pItems) {
long mBytes = pBytesRead / 1000000;
if (megaBytes == mBytes) {
return;
}
megaBytes = mBytes;
System.out.println("We are currently reading item " + pItems);
if (pContentLength == -1) {
System.out.println("So far, " + pBytesRead + " bytes have been read.");
} else {
System.out.println("So far, " + pBytesRead + " of " + pContentLength + " bytes have been read.");
}
}
};
upload.setProgressListener(progressListener);

try {
// Parse the request
List /* FileItem */items = upload.parseRequest(request);

// Process the uploaded items
Iterator iter = items.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();

if (item.isFormField()) {
// Process a regular form field
//processFormField(item);
String name = item.getFieldName();
String value = item.getString("UTF-8");
out.println(name + "=" + value + "
");
} else {
// Process a file upload
//processUploadedFile(item);
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
boolean isInMemory = item.isInMemory();
long sizeInBytes = item.getSize();
out.println("fieldName=" + fieldName + "
");
out.println("fileName=" + fileName + "
");
out.println("contentType=" + contentType + "
");
out.println("isInMemory=" + isInMemory + "
");
out.println("sizeInBytes=" + sizeInBytes + "
");
if (fileName != null && !"".equals(fileName)) {
if (writeToFile) {
fileName = FilenameUtils.getName(fileName);
out.println("fileName to be saved=" + fileName + "
");
String extension = FilenameUtils.getExtension(fileName);
if (allowedFileTypes.indexOf(extension.toLowerCase()) != -1) {
File uploadedFile = new File(saveDirectory, fileName);
item.write(uploadedFile);
} else {
out.println("上傳的檔案不能是" + extension + "
");
}
} else {
//InputStream uploadedStream = item.getInputStream();
//...
//uploadedStream.close();
// Process a file upload in memory
byte[] data = item.get();
out.println("data size=" + data.length + "
");
}
}
}
}
} catch (FileUploadBase.SizeLimitExceededException ex1) {
out.println("上傳檔案超過最大檔案允許大小" + yourMaxRequestSize / (1024 * 1024) + "MB !");
}
%>
[/code]

另外需要在web.xml中加上下列設定：
[code=xml]

...

org.apache.commons.fileupload.servlet.FileCleanerCleanup

...

[/code]
參考資料：
http://commons.apache.org/fileupload/using.html

回覆:JSP精選實用範例(二):檔案上傳

hannibal0416 — GMT

版大您好，請問一下為什麼我會出現這種錯誤
我用tomcat 6.0，win XP sp3 上面的JAR檔也已丟至正確資料夾，
感覺好像是request的問題，麻煩您幫忙解決一下。感謝

org.apache.jasper.JasperException: An exception occurred processing JSP page /test/fileupload.jsp at line 25

22:
23: // Check that we have a file upload request
24:
25: boolean isMultipart = ServletFileUpload.isMultipartContent(request);
26:
27: out.println("isMultipart="+isMultipart+"
");
28:

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

hannibal0416您好：
基本上您給的資訊太少，並不足以判斷問題出在哪裡，可能得請您再花點耐性，把Tomcat的log檔內容看一下，也許就可以找到原因了。

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

由於有網友在問哪段可以取到上傳網頁的檔案說明的欄位的值？簡單說明如下：

上傳網頁的檔案說明的欄位，包在第一個if內，註解有註明是regular form field那段，可以透過欄位名稱比對取得其值：

[code]String fileDesc = null;
...
if (item.isFormField()) {
// Process a regular form field
//processFormField(item);
String name = item.getFieldName();
String value = item.getString("UTF-8");
out.println(name + "=" + value+"
");
if ("filedesc".equals(name)) {
fileDesc = value;
}
} else {
...[/code]

另外如果有需要刪除檔案時，可以參考下列的範例（例如要刪除已上傳的檔案）
[code] // Delete a file
public static boolean deleteFile(String filename) {
File f = new File(filename);
boolean result = false;
if (f.exists()) {
result = f.delete();
if (result != true) {
System.out.println("Delete file failed: " + f.getName());
}
}
return result;
}[/code]

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

如果一次上傳多個檔案，然後要分別儲存上傳的檔案名稱和說明欄資料，可以參考這個範例。
程式碼：
fileupload_streaming.html:
[code=html]

File Upload

檔案上傳

[/code]

fileupload_streaming.jsp:
[code=java]
<%@ page contentType="text/html; charset=UTF-8"%>
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%@ page import="org.apache.commons.fileupload.util.Streams"%>
<%@ page import="org.apache.commons.io.FilenameUtils"%>
<%
String saveDirectory = application.getRealPath("/upload");

// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
out.println("isMultipart="+isMultipart+"
");

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload();

//Create a progress listener
ProgressListener progressListener = new ProgressListener(){
private long megaBytes = -1;
public void update(long pBytesRead, long pContentLength, int pItems) {
long mBytes = pBytesRead / 1000000;
if (megaBytes == mBytes) {
return;
}
megaBytes = mBytes;
System.out.println("We are currently reading item " + pItems);
if (pContentLength == -1) {
System.out.println("So far, " + pBytesRead + " bytes have been read.");
} else {
System.out.println("So far, " + pBytesRead + " of " + pContentLength
+ " bytes have been read.");
}
}
};
upload.setProgressListener(progressListener);

// Parse the request
List fileDescList = new ArrayList();
List fileNameList = new ArrayList();
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream stream = item.openStream();
if (item.isFormField()) {
String value = Streams.asString(stream);
out.println(name + "=" + value+"
");
if ("filedesc".equals(name)) {
fileDescList.add(value);
}
} else {
System.out.println("File field " + name + " with file name "
+ item.getName() + " detected.");
// Process the input stream
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
out.println("fieldName="+fieldName+"
");
out.println("fileName="+fileName+"
");
out.println("contentType="+contentType+"
");
if (fileName != null && !"".equals(fileName)) {
fileName= FilenameUtils.getName(fileName);
out.println("fileName saved="+fileName+"
");
fileNameList.add(fileName);
File uploadedFile = new File(saveDirectory, fileName);
FileOutputStream uploadedFileStream =
new FileOutputStream(uploadedFile);
Streams.copy(stream, uploadedFileStream, true);
}
}
}
for (int i = 0; i < fileNameList.size(); i++) {
String fileDesc = fileDescList.get(i);
String fileName = fileNameList.get(i);
out.println(fileName+":"+fileDesc+"
");
// save to database for future use
}
%>
[/code]

回覆:JSP精選實用範例(二):檔案上傳

victer0327 — GMT

請問板大，檔案上傳時的說明(filedesc)輸入中文會出現亂碼，這該如何解決呢??

回覆:JSP精選實用範例(二):檔案上傳

A-man — GMT

感謝版大的分享,

本人是jsp, java 新手,
剛剛正想在功課加上上傳的功能 , 搜尋之下 , 找到你的主題, 我真的太幸運了 ^^

在網上找了一下, 找不到明確的方法,
所以想問問安裝函式庫該怎安裝 ?

我正使用eclipse + tomcat 4.1

在Apache Commons的網站我下載了
commons-io-1.4-src.zip & commons-fileupload-1.2.1-src.zip

解壓後發現內有很多不同的檔案,

我是應該把以下兩個目錄個的檔案, 全部複製到我eclipse 的Project 內 ?
commons-fileupload-1.2.1-src\src\java\org
和
commons-io-1.4-src\src\java\org\

謝謝你 ^^

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

[quote=victer0327]請問板大，檔案上傳時的說明(filedesc)輸入中文會出現亂碼，這該如何解決呢??[/quote]
試著自己找答案看看，一般通常就是編碼的問題，可以查查看API中有沒有和原來使用的method同樣名稱，但多了一個encoding之類的參數的method。
API的網址如下：
http://commons.apache.org/fileupload/apidocs/index.html

在Streams類別中有個asString 的method，描述如下：
static java.lang.String asString(java.io.InputStream pStream, java.lang.String pEncoding)
This convenience method allows to read a FileItemStream's content into a string, using the given character encoding.

試著把原來的程式中的
[code]String value = Streams.asString(stream); [/code]
改為
[code]String encoding = "UTF-8";
String value = Streams.asString(stream, encoding); [/code]
看看，如果不行再依序調整encoding的值為"Big5", "MS950", "ISO-8859-1", ...

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

[quote=A-man]
在網上找了一下, 找不到明確的方法,
所以想問問安裝函式庫該怎安裝 ?

我正使用eclipse + tomcat 4.1

在Apache Commons的網站我下載了
commons-io-1.4-src.zip & commons-fileupload-1.2.1-src.zip

解壓後發現內有很多不同的檔案,

我是應該把以下兩個目錄個的檔案, 全部複製到我eclipse 的Project 內 ?
commons-fileupload-1.2.1-src\src\java\org
和
commons-io-1.4-src\src\java\org\

謝謝你 ^^[/quote]
A-man您應該只需要放jar檔到lib目錄下就好，去下載binary的版本吧！

回覆:JSP精選實用範例(二):檔案上傳

A-man — GMT

嘗試把jar檔加入IDE 和直接將 java source放進去 ,
上傳能正確運作, 不過在兩個class發現錯誤

如下圖, class 內有數個相同的Error

我使用的是 j2sdk-1_4_2_17 & apache-tomcat-4.1.40

會不會是因為java 的version問題 ?

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

A-man您好：
您可以參考這個網址下載相依性的jar檔
http://commons.apache.org/fileupload/dependencies.html

回覆:JSP精選實用範例(二):檔案上傳

A-man — GMT

To andowson:

感謝你的幫忙, 問題解決了, 謝謝

回覆:JSP精選實用範例(二):檔案上傳

lionsgogo — GMT

org.apache.jasper.JasperException: Exception in JSP: /fileupload.jsp:74

71: fileName= FilenameUtils.getName(fileName);
72: out.println("fileName saved="+fileName+"
");
73: File uploadedFile = new File(saveDirectory, fileName);
74: item.write(uploadedFile);
75: }
76: }
77: }

為什麼會有錯誤??

JSP精選實用範例(二):檔案上傳

lionsgogo — GMT

請問如果將檔案上傳後

如何查詢<將檔案名稱顯示出來>

還有怎麼寫一個網頁

將查詢到想要的檔案下載下來

謝謝你

幫這我很大

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

[quote=lionsgogo]org.apache.jasper.JasperException: Exception in JSP: /fileupload.jsp:74

71: fileName= FilenameUtils.getName(fileName);
72: out.println("fileName saved="+fileName+"
");
73: File uploadedFile = new File(saveDirectory, fileName);
74: item.write(uploadedFile);
75: }
76: }
77: }

為什麼會有錯誤??[/quote]
lionsgogo您好:
請您檢查一下在您網頁的根目錄下有沒有/upload這個目錄？
如果沒有的話跑出來的錯誤訊息應該會類似這樣子
[quote]HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /fileupload.jsp at line 74

71: fileName= FilenameUtils.getName(fileName);
72: out.println("fileName saved="+fileName+"
");
73: File uploadedFile = new File(saveDirectory, fileName);
74: item.write(uploadedFile);
75: }
76: }
77: }

Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:404)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

java.io.FileNotFoundException: D:\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\examples\upload\2009蓮藕粉訂單.txt (系統找不到指定的路徑。)
java.io.FileOutputStream.open(Native Method)
java.io.FileOutputStream.(Unknown Source)
java.io.FileOutputStream.(Unknown Source)
org.apache.commons.fileupload.disk.DiskFileItem.write(DiskFileItem.java:416)
org.apache.jsp.fileupload_jsp._jspService(fileupload_jsp.java:133)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.

--------------------------------------------------------------------------------

Apache Tomcat/6.0.20[/quote]

請手動建立它，如果是在Linux上請設定為可寫入的權限(chmod 777 upload)。

回覆:JSP精選實用範例(二):檔案上傳

mylipton — GMT

您好
想請問一下,我用fileupload_control.jsp這個範例程式傳上去的檔案的檔名會變成亂碼
有人知道這是哪裡有問題嗎

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

mylipton您好:
請問您是在什麼系統環境下執行所產生的問題? 請您提供更多資訊以便大家可以較快得幫忙您。例如
OS版本：
Servlet Container版本：
JDK版本：
上傳前檔案名稱：
上傳後檔案名稱：
參考資料：附上錯誤畫面及有錯誤的程式原始碼。
另外也請您參考本篇文章先前的討論內容尋找解答。

回覆:JSP精選實用範例(二):檔案上傳

mylipton — GMT

andowson謝謝
我解決了上傳檔名的問題
雖然也不清楚怎麼改好的
就是把big5 UTF-8 那些亂試
終於試到可以

回覆:JSP精選實用範例(二):檔案上傳

shyk — GMT

andowsonsup您好:
我用了fileupload_streaming.html後，檔案並沒上傳，瀏覽器直接顯示成:
------------------------------
isMultipart=true
fieldName=file
fileName=1.jpg
contentType=image/jpeg
isInMemory=true
sizeInBytes=782266
fileName to be saved=1.jpg
filedesc=
----------------------------------
不知問題要如何解決??
但我在TOMCAT上是OK的.
OS版本：windows
Servlet Container版本： glassfish
JDK版本： jdk1.6.0_21
上傳前檔案名稱： 1.jpg
上傳後檔案名稱： 1.jpg

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

shyk您好：
我下載的是本主題的第二篇文章的附檔fileupload_streaming.html及fileupload_streaming.jsp，然後安裝GlassFish Server Open Source Edition 3.0.1(安裝在C:\glassfishv3)，經過實際測試顯示的畫面如下：
------------------------------
isMultipart=true
fieldName=file
fileName=1.jpg
contentType=image/jpeg
fileName saved=1.jpg
filedesc=
------------------------------
檔案有出現在upload資料夾下，實際的路徑是：
C:\glassfishv3\glassfish\domains\domain1\applications\example\upload
所以，在GlassFish應該也是沒問題的。（其實，過程中有遇到一個小狀況就是，我用Eclipse把所有的檔案包成一個example.war，原本的example.war裡面明明有放一個upload的空目錄，但是佈署後，該目錄卻消失了，造成上傳失敗，手動建立後，再上傳就成功了）

比對你的輸出畫面文字跟我的不太相同，不知道您下載的是哪一篇文章的附檔？您可以檢查一下GlassFish的logs目錄下面的server.log，看看錯誤訊息為何，應該就可以知道問題在哪邊了。

回覆:JSP精選實用範例(二):檔案上傳

aauggogogo — GMT

請問版大我下載第二個程式，但在上傳時如果檔名是中文會產生??的亂碼，檔案除了檔名外皆正常上傳。
也試過用不同的檔名編碼來儲存，但是都無法成功儲存中文檔名。

OS: solaris10
Web Server: Sun GlassFish Enterprise Server v2.1.1

感謝

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

aauggogogo您好:
我想您是由Windows環境將中文檔名的檔案上傳到Solaris的檔案系統，然後看到上傳的檔名變成??的樣子吧？

由於我目前手邊沒有Solaris 10的環境，所以我改用Linux環境的經驗來說明，供您參考：

首先，參考這篇文章[url=http://www.herongyang.com/Java/System-JVM-and-OS-System-Properties.html]JVM and OS System Properties[/url]，將下列的程式碼編譯成SysProperties.class

SysProperties.java:
[code]
import java.util.Properties;

public class SysProperties {
public static void main(String[] args) {
Properties sysProps = System.getProperties();
sysProps.list(System.out);
}
}[/code]

然後執行
[code]java SysProperties[/code]

可以得到類似下面的輸出
:arrow: Windows:
-- listing properties --
java.runtime.name=Java(TM) SE Runtime Environment
sun.boot.library.path=C:\Program Files\Java\jdk1.6.0_23\jre...
java.vm.version=19.0-b09
java.vm.vendor=Sun Microsystems Inc.
java.vendor.url=http://java.sun.com/
path.separator=;
java.vm.name=Java HotSpot(TM) Client VM
file.encoding.pkg=sun.io
user.country=TW
sun.java.launcher=SUN_STANDARD
sun.os.patch.level=Service Pack 3
java.vm.specification.name=Java Virtual Machine Specification
user.dir=D:\workspace\test
java.runtime.version=1.6.0_23-b05
java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs=C:\Program Files\Java\jdk1.6.0_23\jre...
os.arch=x86
java.io.tmpdir=C:\DOCUME~1\user\LOCALS~1\Temp\
line.separator=

java.vm.specification.vendor=Sun Microsystems Inc.
user.variant=
os.name=Windows XP
sun.jnu.encoding=MS950
java.library.path=C:\Program Files\Java\jdk1.6.0_23\bin...
java.specification.name=Java Platform API Specification
java.class.version=50.0
sun.management.compiler=HotSpot Client Compiler
os.version=5.1
user.home=C:\Documents and Settings\user
user.timezone=
java.awt.printerjob=sun.awt.windows.WPrinterJob
[color=red]file.encoding=MS950[/color]
java.specification.version=1.6
user.name=andowson
java.class.path=D:\workspace\test\bin
java.vm.specification.version=1.0
sun.arch.data.model=32
java.home=C:\Program Files\Java\jdk1.6.0_23\jre
java.specification.vendor=Sun Microsystems Inc.
user.language=zh
awt.toolkit=sun.awt.windows.WToolkit
java.vm.info=mixed mode, sharing
java.version=1.6.0_23
java.ext.dirs=C:\Program Files\Java\jdk1.6.0_23\jre...
sun.boot.class.path=C:\Program Files\Java\jdk1.6.0_23\jre...
java.vendor=Sun Microsystems Inc.
file.separator=\
java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport...
sun.cpu.endian=little
sun.io.unicode.encoding=UnicodeLittle
sun.desktop=windows
sun.cpu.isalist=pentium_pro+mmx pentium_pro pentium+m...

:arrow: Linux:
[andowson@scm ~]$ java SysProperties
-- listing properties --
java.runtime.name=Java(TM) SE Runtime Environment
sun.boot.library.path=/usr/java/jdk1.6.0_23/jre/lib/i386
java.vm.version=19.0-b09
java.vm.vendor=Sun Microsystems Inc.
java.vendor.url=http://java.sun.com/
path.separator=:
java.vm.name=Java HotSpot(TM) Server VM
file.encoding.pkg=sun.io
user.country=TW
sun.java.launcher=SUN_STANDARD
sun.os.patch.level=unknown
java.vm.specification.name=Java Virtual Machine Specification
user.dir=/home/andowson
java.runtime.version=1.6.0_23-b05
java.awt.graphicsenv=sun.awt.X11GraphicsEnvironment
java.endorsed.dirs=/usr/java/jdk1.6.0_23/jre/lib/endorsed
os.arch=i386
java.io.tmpdir=/tmp
line.separator=

java.vm.specification.vendor=Sun Microsystems Inc.
os.name=Linux
sun.jnu.encoding=UTF-8
java.library.path=/usr/java/jdk1.6.0_23/jre/lib/i386/se...
java.specification.name=Java Platform API Specification
java.class.version=50.0
sun.management.compiler=HotSpot Tiered Compilers
os.version=2.6.18-194.11.1.el5
user.home=/home/andowson
user.timezone=
java.awt.printerjob=sun.print.PSPrinterJob
[color=red]file.encoding=UTF-8[/color]
java.specification.version=1.6
user.name=andowson
java.class.path=.
java.vm.specification.version=1.0
sun.arch.data.model=32
java.home=/usr/java/jdk1.6.0_23/jre
java.specification.vendor=Sun Microsystems Inc.
user.language=zh
java.vm.info=mixed mode
java.version=1.6.0_23
java.ext.dirs=/usr/java/jdk1.6.0_23/jre/lib/ext:/us...
sun.boot.class.path=/usr/java/jdk1.6.0_23/jre/lib/resourc...
java.vendor=Sun Microsystems Inc.
file.separator=/
java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport...
sun.cpu.endian=little
sun.io.unicode.en

然後觀察file.encoding這個系統屬性的值，可以發現在Windows上是MS950，在Linux上是UTF-8，也就是說JVM預設的編碼將會採用MS950和UTF-8來處理檔案的I/O。故通常都會出現一些錯誤訊息，例如File Not Found或寫檔時，檔名看到一堆??和亂碼。

解決的方法：
目前我是將Linux的預設編碼改為Big5，修改/etc/sysconfig/i18n（ :!: 需要重開機reboot OS）:
[code]LANG="zh_TW.Big5"[/code]
另外一種方式（沒試過請自行確認）是啟動JVM時加上-Dfile.encoding=MS950或-Dfile.encoding=Big5

參考資料：
http://stackoverflow.com/questions/361975/setting-the-default-java-character-encoding

回覆:JSP精選實用範例(二):檔案上傳

aauggogogo — GMT

目前server字集為ISO646-US，由於某些原因，無法允許改變字集。
因為沒轍了，所以目前想改其他方式(資料庫存中文檔名)解決。
感謝andowson大大的回覆。

回覆:JSP精選實用範例(二):檔案上傳

kisskevin524 — GMT

可以請問一下可以把上傳路徑不要設在tomcat底下嗎?
可以自己設定檔案路徑嗎?
例如c:\upload
謝謝!!

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

中文檔名上傳後變成亂碼或??的問題可以透過指定來源表單的編碼方式修正，另外上傳目錄也可以修改到Tomcat以外的目錄，例如C:\upload下（目錄不存在時也可以自動建立）
首先將來源表單的charset設為UTF-8
fileupload_streaming.html:
[code]

File Upload

檔案上傳

[/code]
處理上傳的程式加上request.setCharacterEncoding(encoding);
fileupload_streaming.jsp:
[code]<%@ page contentType="text/html; charset=UTF-8"%>
<%@ page import="java.io.*"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%@ page import="org.apache.commons.fileupload.util.Streams"%>
<%@ page import="org.apache.commons.io.FilenameUtils"%>
<%
//String saveDirectory = application.getRealPath("/upload");
// Change save direcoty to another place outside of Tomcat
String saveDirectory = "C:/upload";
File dir = new File(saveDirectory);
if (!dir.exists()) {
boolean success = dir.mkdir();
if (success) {
System.out.println("Directory: " + saveDirectory + " created");
}
}

out.println("file.encoding=" + System.getProperty("file.encoding") + "
");

// Solve Chinese filename problem: use original form encoding
String encoding = "UTF-8";
request.setCharacterEncoding(encoding);

// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
out.println("isMultipart=" + isMultipart + "
");

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload();

//Create a progress listener
ProgressListener progressListener = new ProgressListener(){
private long megaBytes = -1;
public void update(long pBytesRead, long pContentLength, int pItems) {
long mBytes = pBytesRead / 1000000;
if (megaBytes == mBytes) {
return;
}
megaBytes = mBytes;
System.out.println("We are currently reading item " + pItems);
if (pContentLength == -1) {
System.out.println("So far, " + pBytesRead + " bytes have been read.");
} else {
System.out.println("So far, " + pBytesRead + " of " + pContentLength
+ " bytes have been read.");
}
}
};
upload.setProgressListener(progressListener);

// Parse the request
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream stream = item.openStream();
if (item.isFormField()) {
String value = Streams.asString(stream, encoding);
out.println(name + "=" + value + "
");
} else {
System.out.println("File field " + name + " with file name "
+ item.getName() + " detected.");
// Process the input stream
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
out.println("fieldName=" + fieldName + "
");
out.println("fileName=" + fileName + "
");
out.println("contentType=" + contentType + "
");
if (fileName != null && !"".equals(fileName)) {
fileName = FilenameUtils.getName(fileName);
out.println("fileName saved=" + fileName + "
");
File uploadedFile = new File(saveDirectory, fileName);
FileOutputStream uploadedFileStream =
new FileOutputStream(uploadedFile);
Streams.copy(stream, uploadedFileStream, true);
}
}
}
%>
[/code]

JSP精選實用範例(二):檔案上傳

kisskevin524 — GMT

請問一下
大大有做過上傳過上百mb的檔案嗎
上傳大檔似乎會timeout
謝謝!!

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

實際測試上傳一個1GB多的檔案，確實會出現Read timed out的結果:
[code=plain]So far, 1069001476 of 1073742116 bytes have been read.
We are currently reading item 1
So far, 1070000168 of 1073742116 bytes have been read.
We are currently reading item 1
So far, 1071002992 of 1073742116 bytes have been read.
We are currently reading item 1
So far, 1072001684 of 1073742116 bytes have been read.
We are currently reading item 1
So far, 1073000376 of 1073742116 bytes have been read.
一月 16, 2012 2:25:28 上午 org.apache.catalina.core.StandardWrapperValve invoke
嚴重: Servlet.service() for servlet [jsp] in context with path [] threw exception [An exception occurred processing JSP page /fileupload_streaming.jsp at line 65

62: File uploadedFile = new File(saveDirectory, fileName);
63: FileOutputStream uploadedFileStream =
64: new FileOutputStream(uploadedFile);
65: Streams.copy(stream, uploadedFileStream, true);
66: }
67: }
68: }

Stacktrace:] with root cause
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at org.apache.coyote.ajp.AjpProcessor.read(AjpProcessor.java:309)
at org.apache.coyote.ajp.AjpProcessor.readMessage(AjpProcessor.java:364)
at org.apache.coyote.ajp.AjpProcessor.receive(AjpProcessor.java:331)
at org.apache.coyote.ajp.AbstractAjpProcessor.refillReadBuffer(AbstractAjpProcessor.java:576)
at org.apache.coyote.ajp.AbstractAjpProcessor$SocketInputBuffer.doRead(AbstractAjpProcessor.java:1027)
at org.apache.coyote.Request.doRead(Request.java:422)
at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:290)
at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:429)
at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:315)
at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:200)
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:976)
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:886)
at java.io.InputStream.read(Unknown Source)
at org.apache.commons.fileupload.util.Streams.copy(Streams.java:96)
at org.apache.commons.fileupload.util.Streams.copy(Streams.java:66)
at org.apache.jsp.fileupload_005fstreaming_jsp._jspService(fileupload_005fstreaming_jsp.java:125)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.ha.tcp.ReplicationValve.invoke(ReplicationValve.java:333)
at org.apache.catalina.ha.session.JvmRouteBinderValve.invoke(JvmRouteBinderValve.java:219)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:298)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)[/code]
[quote]HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /fileupload_streaming.jsp at line 65

62: File uploadedFile = new File(saveDirectory, fileName);
63: FileOutputStream uploadedFileStream =
64: new FileOutputStream(uploadedFile);
65: Streams.copy(stream, uploadedFileStream, true);
66: }
67: }
68: }

Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:460)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause

java.net.SocketTimeoutException: Read timed out
java.net.SocketInputStream.socketRead0(Native Method)
java.net.SocketInputStream.read(Unknown Source)
java.net.SocketInputStream.read(Unknown Source)
org.apache.coyote.ajp.AjpProcessor.read(AjpProcessor.java:309)
org.apache.coyote.ajp.AjpProcessor.readMessage(AjpProcessor.java:364)
org.apache.coyote.ajp.AjpProcessor.receive(AjpProcessor.java:331)
org.apache.coyote.ajp.AbstractAjpProcessor.refillReadBuffer(AbstractAjpProcessor.java:576)
org.apache.coyote.ajp.AbstractAjpProcessor$SocketInputBuffer.doRead(AbstractAjpProcessor.java:1027)
org.apache.coyote.Request.doRead(Request.java:422)
org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:290)
org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:429)
org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:315)
org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:200)
org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:976)
org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:886)
java.io.InputStream.read(Unknown Source)
org.apache.commons.fileupload.util.Streams.copy(Streams.java:96)
org.apache.commons.fileupload.util.Streams.copy(Streams.java:66)
org.apache.jsp.fileupload_005fstreaming_jsp._jspService(fileupload_005fstreaming_jsp.java:125)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.23 logs.

Apache Tomcat/7.0.23[/quote]
實際上傳的檔案大小如下:
[code=plain]-rw-r--r-- 1 tomcat tomcat 1073094361 2012-01-16 02:25 ppsds.pgf[/code]
目前我的web.xml中設定如下:
[code=xml]

[/code]
目前我不確定是否跟session-timeout這個值有關係(10分鐘)，不過整個1GB檔案上傳的時間大約有花半小時以上，您可以試試看調整這個參數再測試看看。

回覆:JSP精選實用範例(二):檔案上傳

羽小橘 — GMT

[quote=andowson]中文檔名上傳後變成亂碼或??的問題可以透過指定來源表單的編碼方式修正，另外上傳目錄也可以修改到Tomcat以外的目錄，例如C:\upload下（目錄不存在時也可以自動建立）
首先將來源表單的charset設為UTF-8
fileupload_streaming.html:
%>
[/code][/quote]

大大我想請問一下現在上傳檔案的姓名根據檔案原本的名稱，也就是說相同的名稱，會覆蓋同一個名稱，可以變成自己輸入檔案名稱嗎?

檔案說明的部分有什麼作用嗎?

上傳之後的訊息 (是哪一段程式碼作用) 想再增加一個按鍵返回原頁面

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

如果要讓上傳後的檔案名稱可以另外指定的話，我們需要加上一個新的欄位filename在表單的最前面(因為是系統是依序處理的)
fileupload_streaming.html:
[code=html]

File Upload

檔案上傳

存檔名稱：伺服器上儲存之檔案名稱(空白表示與上傳檔案名稱相同)

檔案說明：請描述該檔案的內容

[/code]
在處理表單資料時，我們需要另外宣告一個filenameSaved字串變數放在while迴圈外面，初始值設為null，等到while迴圈內部讀取到filename這個欄位名稱時將value的值設定給它。
接下來處理到file型態的表單資料時，再比對上傳的檔案名稱和我們的存檔名稱是否相同，若有設定新的存檔名稱時，將fileName變數的值改為我們設定的filenameSaved。下面就照原來的邏輯去處理即可。

fileupload_streaming.jsp:
[code]
<%@ page contentType="text/html; charset=UTF-8"%>
<%@ page import="java.io.*"%>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>
<%@ page import="org.apache.commons.fileupload.util.Streams"%>
<%@ page import="org.apache.commons.io.FilenameUtils"%>
<%
String saveDirectory = application.getRealPath("/upload");
// Change save direcoty to another place outside of Tomcat
//String saveDirectory = "C:/upload";
File dir = new File(saveDirectory);
if (!dir.exists()) {
boolean success = dir.mkdir();
if (success) {
System.out.println("Directory: " + saveDirectory + " created");
}
}

out.println("file.encoding=" + System.getProperty("file.encoding") + "
");

// Solve Chinese filename problem: use original form encoding
String encoding = "UTF-8";
request.setCharacterEncoding(encoding);

// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
out.println("isMultipart=" + isMultipart + "
");

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload();

//Create a progress listener
ProgressListener progressListener = new ProgressListener(){
private long megaBytes = -1;
public void update(long pBytesRead, long pContentLength, int pItems) {
long mBytes = pBytesRead / 1000000;
if (megaBytes == mBytes) {
return;
}
megaBytes = mBytes;
System.out.println("We are currently reading item " + pItems);
if (pContentLength == -1) {
System.out.println("So far, " + pBytesRead + " bytes have been read.");
} else {
System.out.println("So far, " + pBytesRead + " of " + pContentLength
+ " bytes have been read.");
}
}
};
upload.setProgressListener(progressListener);

// Parse the request
FileItemIterator iter = upload.getItemIterator(request);
String filenameSaved = null;
while (iter.hasNext()) {
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream stream = item.openStream();
if (item.isFormField()) {
String value = Streams.asString(stream, encoding);
out.println(name + "=" + value + "
");
if ("filename".equals(name)) {
filenameSaved = value;
System.out.println(name + "=" + value);
}
} else {
System.out.println("File field " + name + " with file name "
+ item.getName() + " detected.");
// Process the input stream
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
out.println("fieldName=" + fieldName + "
");
out.println("fileName=" + fileName + "
");
out.println("contentType=" + contentType + "
");
if (fileName != null && !"".equals(fileName)) {
fileName = FilenameUtils.getName(fileName);
if (filenameSaved != null && !"".equals(filenameSaved) && !filenameSaved.equals(fileName)) {
fileName = filenameSaved;
}
out.println("fileName saved=" + fileName + "
");
File uploadedFile = new File(saveDirectory, fileName);
FileOutputStream uploadedFileStream =
new FileOutputStream(uploadedFile);
Streams.copy(stream, uploadedFileStream, true);
}
}
}
%>

[/code]
檔案說明這欄是當您想要將這些表單資料儲存到資料庫時才有用。

回上頁的按鈕可以加在最底下:
[code=html][/code]

回覆:JSP精選實用範例(二):檔案上傳

hero9 — GMT

請問大大:

可以夾帶資料過去嗎

就是我要在第1頁session

可是下一頁就是抓不到

該如何解決

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

hero9您好:
請把您在程式哪裡加上session，然後怎麼取出session指出一下。
(請附上您的程式碼方便了解您的問題所在)

回覆:JSP精選實用範例(二):檔案上傳

hero9 — GMT

andowson大大:

我有試過把 form 裡的 enctype="multipart/form-data" 拿掉

這樣的話我想取的值是取得到的，但這樣就無法上傳了(只是測試)

1.也有試過讓 form 裡的 action 到本頁，最後再用 javascript 到下一頁去

2.最後想說讓值先到 hidden 裡，然後下一頁再用 request.getParameter 去接

兩者都行不通

下一頁我有打

String sd = (String)session.getAttribute("sd");
out.println(sd);

sd顯示是null

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

hero9您好:
可否請您說清楚您的網頁流程，例如
text.jsp->fileupload.jsp->next.jsp
text.jsp會傳兩個參數file1(file型態), sd(select型態)給fileupload.jsp
在fileupload.jsp會取出file1及sd的值, 並將sd的值設定到session變數sd去。
然後由next.jsp再取出session變數sd的值?

回覆:JSP精選實用範例(二):檔案上傳

sweetxuite — GMT

你好

請問我現在要傳到別人的server

我下載您的範例檔已經上傳到他主機的ftp內

然後用他的主機開上傳網頁按下上傳之後出現

org.apache.jasper.JasperException: An exception occurred processing JSP page /stu/csie101/14994046/testjsp/fileupload.jsp at line 74

java.io.FileNotFoundException: D:\AppServ\Tomcat 6.0\webapps\ROOT\images\05_45_3_web.jpg (系統找不到指定的路徑。)

他找不到路徑可是我上傳到FTP資料夾的裡面有建upload資料夾

---------FTP資料夾
upload->資料夾
fileupload.jsp
fileupload.html

---------

這樣怎麼解決呢

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

sweetxuite 你好，

請問這部Server是否為Linux或UNIX-like系統，因為看起來檔案路徑是長這樣
/stu/csie101/14994046/testjsp/fileupload.jsp

又就錯誤訊息看起來是指定了一個Windows上面的檔案路徑:
D:\AppServ\Tomcat 6.0\webapps\ROOT\images\05_45_3_web.jpg (系統找不到指定的路徑。)

所以可能要請您確認一下fileupload.jsp的內容是否有修改過，另一種是去找出Server上Tomcat自動轉譯產生的中間原始檔fileupload_jsp.java的內容確認一下第74行的內容為何。

回覆:JSP精選實用範例(二):檔案上傳

初心者 — GMT

上傳已經成功了感謝!

可是，傳到build裡面，圖片抓不出來，請問該怎麼解決???

回覆:JSP精選實用範例(二):檔案上傳

初心者 — GMT

[quote=初心者]上傳已經成功了感謝!

可是，傳到build裡面，圖片抓不出來，請問該怎麼解決???[/quote]

.jpg" width="100px" height="156px">

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

初心者您好:
依我初步的了解，您應該是使用NetBeans IDE作為開發環境，build這個目錄傳統上應該是IDE環境自動產生，用來放置編譯後程式的地方，所以不應該將build列入您的路徑上。
建議您將檔案上傳到web/images目錄下，然後將圖片的路徑改為下面這樣測試看看:

.jpg" width="100px" height="156px">

回覆:JSP精選實用範例(二):檔案上傳

初心者 — GMT

你好，已經可以抓得到照片了感謝你~

但我現在遇到一個問題是我要把regular form field 寫入到資料庫中

我是這樣子寫的

String fileName = null;
String value = null;
String v2 = null;
String v3 = null;
String v4 = null;
String v5 = null;
String v6 = null;

while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();

if (item.isFormField()) {
// Process a regular form field
//processFormField(item);
String name = item.getFieldName();
value = item.getString();
String n2 = item.getFieldName();
v2 = item.getString();
String n3 = item.getFieldName();
v3 = item.getString();
String n4 = item.getFieldName();
v4 = item.getString();
String n5 = item.getFieldName();
v5 = item.getString();
String n6 = item.getFieldName();
v6 = item.getString();
value = new String(value.getBytes("UTF-8"), "ISO-8859-1");
v2 = new String(value.getBytes("UTF-8"), "ISO-8859-1");
v3 = new String(value.getBytes("UTF-8"), "ISO-8859-1");
v4 = new String(value.getBytes("UTF-8"), "ISO-8859-1");
v5 = new String(value.getBytes("UTF-8"), "ISO-8859-1");
v6 = new String(value.getBytes("UTF-8"), "ISO-8859-1");

但是我存入的時候會是亂碼，而且中文似乎沒辦法

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

初心者您好:
您可以參考這篇的#27號回應相關說明
http://www.andowson.com/posts/list/15/197.page

回覆:JSP精選實用範例(二):檔案上傳

dream1978 — GMT

版大：
我用你提供的範本檔案來執行，但是有些問題!!!
我是用Eclipse + JBoos-4.0.5.GA + jdk1.6.0_41

程式中我有多加下列兩行，建立目錄用的
File mkupload = new File(saveDirectory);
mkupload.mkdir();

請問一下，我是那個部分沒有注意到的嗎？

錯誤訊息如下：
exception

org.apache.jasper.JasperException: Exception in JSP: /fileupload.jsp:48

45: upload.setProgressListener(progressListener);
46:
47: // Parse the request
48: List items = upload.parseRequest(request);
49:
50: // Process the uploaded items
51:

Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:506)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

root cause

javax.servlet.ServletException: Bad version number in .class file
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:843)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:776)
org.apache.jsp.fileupload_jsp._jspService(fileupload_jsp.java:140)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

root cause

java.lang.UnsupportedClassVersionError: Bad version number in .class file
java.lang.ClassLoader.defineClass1(Native Method)
java.lang.ClassLoader.defineClass(Unknown Source)
java.security.SecureClassLoader.defineClass(Unknown Source)
org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1815)
org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:869)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1322)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1201)
java.lang.ClassLoader.loadClassInternal(Unknown Source)
org.apache.commons.fileupload.util.Streams.copy(Streams.java:123)
org.apache.commons.fileupload.util.Streams.copy(Streams.java:70)
org.apache.commons.fileupload.MultipartStream.readBodyData(MultipartStream.java:593)
org.apache.commons.fileupload.MultipartStream.discardBodyData(MultipartStream.java:617)
org.apache.commons.fileupload.MultipartStream.skipPreamble(MultipartStream.java:634)
org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:1023)
org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.(FileUploadBase.java:1003)
org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:310)
org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:334)
org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:115)
org.apache.jsp.fileupload_jsp._jspService(fileupload_jsp.java:96)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

dream1978您好:
你的主要問題原因是這一行:
[code]java.lang.UnsupportedClassVersionError: Bad version number in .class file[/code]
請檢查Eclipse中的Java compiler設定是哪個版本的JDK

回覆:JSP精選實用範例(二):檔案上傳

dream1978 — GMT

[quote=andowson]dream1978您好:
你的主要問題原因是這一行:
[code]java.lang.UnsupportedClassVersionError: Bad version number in .class file[/code]
請檢查Eclipse中的Java compiler設定是哪個版本的JDK[/quote]

有1.5、1.6我都試過，都是一樣的結果
請問大大是否要新的版本才支援？如果是新版才支援的話，那是否1.5或是1.6有支援的寫法呢？

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

這個問題應該還是環境面的問題，跟程式語法無關。
主要原因就是使用較高版本的JDK編譯後放到較低版本的JDK或JRE中去執行程式。
如果你可以附上Project中Java Compiler及JBoss中使用的JDK版本，就比較方便比較。

回覆:JSP精選實用範例(二):檔案上傳

dream1978 — GMT

我把我開發的軟體版本放上去，再麻煩大大一下，謝謝
http://cht.tw/h/3n24h

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

為什麼會出現jre1.5.0_14.rar ?

回覆:JSP精選實用範例(二):檔案上傳

dream1978 — GMT

[quote=andowson]為什麼會出現jre1.5.0_14.rar ?[/quote]

廠商給的教學影片有提到要把1.5版的jre加進去，問廠商也是說目前公司是1.5的環境，所以才會加這一個

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

dream1978這樣子問題的原因就很清楚了，你在Eclipse用JDK 1.6編譯，但是上線環境JBoss用的是JRE 1.5，就會出現這個問題。
請在Eclipse中的Project設定將Java Compiler改為1.5版本，再重新編。

回覆:JSP精選實用範例(二):檔案上傳

dream1978 — GMT

請問大大一下，除了這三個地方可以修改之外，還有那個地方是我遺漏的地方？

回覆:JSP精選實用範例(二):檔案上傳

andowson — GMT

dream1978您好:
請在Eclipse的Project名稱上面點一下滑鼠右鍵，點選Properties會跳出一個對話框，調整這邊的Java Compiler設定看看。